Partlist
AddOn Board - General Sensing
Common Parts - see Farnell Code  
Number Description Part in Schematic Farnell order code (2002) Price each (estimate in £) overall cost
1 Capacitors, 0.1uF C1, C2 354-9641 £0.10 £0.10
1 Capacitors, 10nF C3 237-270 £0.10 £0.10
1 36-way header, cut in 3,8,9 ways to make the PICK-STACK-CON CON0 528-420 £0.60 £0.60
2 LED Green 3mm LED1, LED2 322-570 £0.10 £0.20
2 8 Pin DIP-IC Socket IC1, IC4 355-0692 £0.30 £0.60
1 QT110-D, 8/DIL, touch sensor IC1 362-5825 £2.00 £2.00
1 DS1621 8/DIL, Temperature sensor IC4 670-704 £2.00 £2.00
2 Resistor 1k8, 204/5 R2, R3 770-097 £0.05 £0.10
1 Resistor 120, 204/5 R1 770-206 £0.05 £0.05
2 TSL250 Light sensor (other compatiple ones can be found at http://www.taosinc.com/light_to_voltage.htm) Sen1, Sen2 460-898 £2.00 £4.00
Specific componets  
1 Dual Axis Accelerometer  (ADXL202E,   LCC-8) http://products.analog.com/products/info.asp?product=ADXL202 IC3 ADXL202JE http://www.analog.com £12.00 £12.00
1 3076 - PIR Motion Detector Module (Assembled & tested)
http://www.quasarelectronics.com/security.htm
Part No 3076, http://www.quasarelectronics.com/ £9.00 £9.00
PCB  
1 sensor-addon-v4.brd (double side prototype, no solder mask, no position print), size 50 by 55 mm PCB upload to http://www.pcb-pool.com/ £10.00 £10.00 (each, if you order 4 or more)
overall estimate £40.75